Tubing bleeder



F. N. CRIPPEN.

l TUBING BLEEDER. APPucATloN man :uns v2, 1922.

Patented Sept. 26, 1922.

14/ farne ,/IZIV/Ilr//zf/v u! 11V F vvv 14 Patented Sept. 26, 1922,

gnarran sTATEs 1,430,212' PATENT l `ori-lca.u

FRED NELSONk CRIPPEN, OF PASADENA, CALIFORNIA.

TUBrNG BLnEnnn.

Application led .Tune v12,

To all whom t may concern y Be it known that 1, FRED NnLsoN CntrrnN, acitizen of the United States, residing at Pasadena, in the county of'LosAngeles and State of California, have invented a new and useful kTubingBleeder, of which the following is a specication.

This invention relates totubing-bleeders and is particularly directed toan improvement over the type of device illustrated and described inPatent No. 1,150,661 issued August 17,1915, to G. C. Bushong. s

The object ofthe present inventionfis to provide a tubing-bleeder whichmay be attached to the standard right-hand threaded well tubing and inwhich the requirement ot a special length of left-hand threaded tubing,as wel] as the provision of special lugs or collars attached .toysaidtubing length is eliminated.v

Another object is to, obtain maximumsimplicity .in a tubing-bleeder ofthe above character.

y Various other objects and advantages will be more fully7 apparent fromthe following description of the accompanying drawings, which form apart of this disclosure, `and which illustrate a preferred form ofembodiment of the invention.

Of the drawings- Figure 1 is a vertical section of an oil well providedwith the improved tubing bleeder.

Fig. 2 is an enlarged sectional detail of a portion of Fig. 1 showingthe parts in normal position.

Fig. 3 is a similar view showing the parts in operated position.

Fig. 4 is a perspective View of the barrel.

Fig. 5 is a perspective view of the releasable collar which isassociated with the welltubing.

Fig, 6 is a perspective view of the stationary collar which isassociated with the barrel.

The present embodiment of the inventionA the upper threaded end of atubing section i922. serial4 No. 567,557.

or sucker rod 7 leading `to the pumping mechanism at the surface. l

In pumps of this character, sand is very liable yto gain access to thepump tubing, C

weight of' the oilcolumn renders this pulling `operation exceedingditlicult and lby pulling the filled tubing the oil therein is wasted. fy

By providing a tubing-bleeder of the character herein referred to, theoil column may be released from the tubing `prior to such pullingoperation. f

The tubing-bleeder illustrated KAin the drawings comprises a stationaryYcollar 10 having a right-hand internal screw-thread at its lower end bywhich 'it is screwed upon 3. Av perforated barrel'll has an internalright-hand screw-thread at its lower yend and is screwed' upon the`upper end .of the collar 10, the upper end of the barrel having aninwardly projecting flange 12.k The upper end of the bore of the collar10 hasa left-hand internal screw-thread which adapts it forengagement/.by the lower lefthand screw-threaded end of a releasablecollar 1,3 positioned within the barrel 11. The upper `endof the bore ofthe collar 13 hasa right-hand screw-thread yadapting it to be screwedupon the lower right-hand screwthreaded end of the adjacent section 3 ofpump tubing.

With this construction l have eliminated the necessity of providing aspecial lefthand threaded section of tubing and as the collar 13 servesas an abutment to limit the relative releasing movement of the parts,the tubing need not have any projections or collars attached thereto asin the above mentioned patented structure.

A valve sleeve 15 is arranged on the lowerkmost tubing section, and asleeve valve seat 16 is arranged within the well casing 1. When the welltubing is lowered from the position shown in Fig. 1, to that shown in nFigs. 2 and 3, the sleeve 15 will engage the n seat 16 and seal theinterior of the casing 1 between said casing and the well tubing.

The operation of the improved tubingbleeder is als follows: When sandhas colwith a bleeder of the type he ein 'n-scloi,

lected in the Well tubing as indicated at 8, and it is desired to bleedthe tubing to release its column of oil, the tubing is lowered until thesleeve valve l5 engages the casing seat 16 and seals the well. casing asabove described.

The tubing is then engaged at the well surface and turned in aright-hand direction causing the lower lett-hand screwthreaded end ofthe collar 13 to be unscrewed from the stationary collar ll). After thecollar 13 is fully disengaged om the collar ll the tubing is elevatedshown in Fig. 3, and the oil within the 'tubing above the sand willdrain out through the perforations of the barrel l1 and into the wellcasing'. The collar 125 by its engagement with the flange l2 of.' thebarrel it limits the separating movement of the tubing scctions andprevents their complete disengagement.

After the oil has run out of thefrtubing the tubing maj7 be 'easilvpulled and cleaned of sand, or the collar 13 mayA be ed with the collar10 without pulling the tubing, if desired.

With a tubing-bleeder ot' the above character, it is not necessary toprovide a snecial length of left-hand threaded tubi to shrink a collaron such tubing. The is of great importance for the reason that it suchspecial length ot tubing is required it then becomes a part ot thebleeder and has to be shipped to the lield of use, where d no left-handthreaded tubing is required, the bleeder being attached to stanirdrighthand threaded tubing` of 'which there always a plentiful supplj7 atthe well I claim:

l. A tubing-bleeder detachably. connetting two adjacent sections otlright-hand screw-threaded wel] tubing and including a first collarsci'eved upon one oiC said tub- 'provided with a stop abutment withwhich the second Icollar engages to limit the separation of the twosections, the barrel having peritorations allowing the escape oi? liquidfrom the tubing when the sections are separated.

2. in a device of the class described, the

combination with a well casing and a pump tubing therein ycomprising aplurality of sections of right-hand screw-threaded 4tubing, cent tubingsections and operable to bleed the tubing, said means comprising a firstcollar screwed upon one of'said sections, a second collar screweduponthe adjacent section and having .a left-hand, screw-threaded engagementin the iirst collar permitting a separation of the two sections by aright-hand rotation ot the one section relative to the other, a barrelcarried by the first collar and sui'- rounding the second collar andadjacent section l and provided withv a stop abutment with which thesecond collar engages to liinit the separation or" the two sections, thebarrel havingr pertcrations. allowing the ,escape of liquid from thetubing when the sections are separated, and ooacting means on the tubingand the casing below the bleeding means to seal the space between thetubing and casing upon a lowering oit' the entire tubing.

Signed at Los Angeles, California, this 6th day oit J une, 1922.

FRED NELSONl CRIPPEN. Witnesses Cmnnitcn B. FosTEfR, L. BELLE meansseparably connecting two adjaj

